src/gallium/drivers/nv04/nv04_fragtex.c

   1 #include "nv04_context.h"
   2
   3 static INLINE int log2i(int i)
   4 {
   5         int r = 0;
   6
   7         if (i & 0xffff0000) {
   8                 i >>= 16;
   9                 r += 16;
  10         }
  11         if (i & 0x0000ff00) {
  12                 i >>= 8;
  13                 r += 8;
  14         }
  15         if (i & 0x000000f0) {
  16                 i >>= 4;
  17                 r += 4;
  18         }
  19         if (i & 0x0000000c) {
  20                 i >>= 2;
  21                 r += 2;
  22         }
  23         if (i & 0x00000002) {
  24                 r += 1;
  25         }
  26         return r;
  27 }
  28
  29 #define _(m,tf)                                                                \
  30 {                                                                              \
  31   PIPE_FORMAT_##m,                                                             \
  32   NV04_DX5_TEXTURED_TRIANGLE_FORMAT_COLOR_##tf,                                               \
  33 }
  34
  35 struct nv04_texture_format {
  36         uint    pipe;
  37         int     format;
  38 };
  39
  40 static struct nv04_texture_format
  41 nv04_texture_formats[] = {
  42         _(A8R8G8B8_UNORM, A8R8G8B8),
  43         _(X8R8G8B8_UNORM, X8R8G8B8),
  44         _(A1R5G5B5_UNORM, A1R5G5B5),
  45         _(A4R4G4B4_UNORM, A4R4G4B4),
  46         _(L8_UNORM,       Y8      ),
  47         _(A8_UNORM,       Y8      ),
  48 };
  49
  50 static uint32_t
  51 nv04_fragtex_format(uint pipe_format)
  52 {
  53         struct nv04_texture_format *tf = nv04_texture_formats;
  54         int i;
  55
  56         for (i=0; i< sizeof(nv04_texture_formats)/sizeof(nv04_texture_formats[0]); i++) {
  57                 if (tf->pipe == pipe_format)
  58                         return tf->format;
  59                 tf++;
  60         }
  61
  62         NOUVEAU_ERR("unknown texture format %s\n", pf_name(pipe_format));
  63         return 0;
  64 }
  65
  66
  67 static void
  68 nv04_fragtex_build(struct nv04_context *nv04, int unit)
  69 {
  70         struct nv04_miptree *nv04mt = nv04->tex_miptree[unit];
  71         struct pipe_texture *pt = &nv04mt->base;
  72
  73         switch (pt->target) {
  74         case PIPE_TEXTURE_2D:
  75                 break;
  76         default:
  77                 NOUVEAU_ERR("Unknown target %d\n", pt->target);
  78                 return;
  79         }
  80
  81         nv04->fragtex.format = NV04_DX5_TEXTURED_TRIANGLE_FORMAT_ORIGIN_ZOH_CORNER
  82                 | NV04_DX5_TEXTURED_TRIANGLE_FORMAT_ORIGIN_FOH_CORNER
  83                 | nv04_fragtex_format(pt->format)
  84                 | ( (pt->last_level + 1) << NV04_DX5_TEXTURED_TRIANGLE_FORMAT_MIPMAP_LEVELS_SHIFT )
  85                 | ( log2i(pt->width[0]) << NV04_DX5_TEXTURED_TRIANGLE_FORMAT_BASE_SIZE_U_SHIFT )
  86                 | ( log2i(pt->height[0]) << NV04_DX5_TEXTURED_TRIANGLE_FORMAT_BASE_SIZE_V_SHIFT )
  87                 | NV04_DX5_TEXTURED_TRIANGLE_FORMAT_ADDRESSU_CLAMP_TO_EDGE
  88                 | NV04_DX5_TEXTURED_TRIANGLE_FORMAT_ADDRESSV_CLAMP_TO_EDGE
  89                 ;
  90 }
  91
  92
  93 void
  94 nv04_fragtex_bind(struct nv04_context *nv04)
  95 {
  96         nv04_fragtex_build(nv04, 0);
  97 }
  98